Boeing 777, headed to San Francisco, turned back to Tokyo after mid-air leak in hydraulic system

A Boeing 777 headed to San Francisco, operated by Japan Airlines, turned back to Tokyo on Monday after its crew detected a leak in the hydraulic system that controls its flaps, the carrier told Reuters early Tuesday morning.

According to the report, the JAL jetliner, carrying 236 passengers, returned to Tokyo's Haneda airport.

Maintenance engineers were investigating the cause of the leak, a spokesman for the Japanese flag carrier told Reuters.